.It is availability to improve GM(1,1) forecasting precision based on the combination of GM(1,1) model and linear regression.But,it is no good to deal with no-saltation points always based on linear regression,and deal with saltation points based on equidistant GM(1,1) model.So,in the paper，it has definite meaning of theory and practice to advance a new GM(1,1) combination model to solve the problem.Finally some examples are given in the paper.